Publication Abstract

Title
Routes of disease introduction to, and spread from, freshwater salmonid farms in England and Wales – gathering expert opinion
Publication Abstract

Routes of disease introduction to, and spread from, freshwater salmonid farms in England and Wales – gathering expert opinion

Peeler, E., Thrush, M., Dunn, P.

European legislation (EC directive 2006/88) requires that fish farms are individually ranked for the risk of disease introduction and spread, to enable risk-based surveillance (RBS). The principle of RBS is that more resources are directed towards those zones, farms and species that are high risk (Stärk et al. 2006). This should ensure efficient use of resources whilst maximising the confidence in disease freedom generated by the outputs of the system.

To support a RBS scheme for notifiable fish pathogens in England and Wales, the Cefas Fish Health Inspectorate (FHI) has developed a risk ranking model based upon the most important routes of pathogen introduction and spread. The model includes the capacity to weight the different routes of introduction and spread for importance (see Oidtmann et al., accepted for publication). However, as very little evidence exists on which to base the weighting, we adopted an approach previously used in aquatic animal health (Gustafson et al. 2005; Gustafson et al. 2010; VHSV Expert Panel and Working Group, 2010) and canvassed expert opinion.

For this exercise we consulted with fish farmers, vets and others providing animal health services to fish farmers. We used a questionnaire to gather expert opinion on the relative importance of routes for the spread of notifiable salmonid pathogens not present in the UK, i.e. viral haemorrhagic septicaemia virus (VHSV), infectious haematopoietic necrosis virus (IHNV) and Gyrodactylus salaris (Gs). The questionnaire was designed to focus on the spread of an exotic pathogen once established but before detection.

Publication Internet Address of the Data
Publication Authors
Peeler, E., Thrush, M., Dunn, P.
Publication Date
September 2011
Publication Reference
Finfish News. 11, 9-15.
Publication DOI: https://doi.org/